The unbalanced equation below shows the combustion of methane. CH4 +02 —CO2 + H2O
Which series of numbers represents the coefficients necessary to balance the equation?

A-1, 1, 1, 2
B-1, 2, 1, 2
C-2, 2, 1, 4
D-0, 3, 2, 2

Although respiratory organs vary across different organisms, they all contain respiratory surfaces that have a large surface area and are extremely thin. explain why having an extremely thin respiratory surface with a large surface area is advantageous for the process of gas exchange